2.4.0

• Union type

import { Class, Union } from 'meteor/jagi:astronomy';

const StringOrNumber = Union.create({
  name: 'StringOrNumber',
  types: [String, Number],
  cast(value) {
    if (typeof value !== 'string') {
      return String(value);
    }
    return value;
  }
});

const Item = Class.create({
  name: 'Item',
  fields: {
    strOrNum: StringOrNumber
  }
});